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ZAU controller was unable to prevent a loss of separation between a B757 climbing to FL410 and an air carrier level at FL390.
| Attributes | |
| ACN | 543747 |
| Time | |
| Date | 200204 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| State Reference | IL |
| Altitude | msl single value : 39000 |
| Environment | |
| Weather Elements | Turbulence |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zau.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : vacating altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zau.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar pilot : instrument |
| Experience | controller time certified in position1 : 15 flight time total : 700 |
| ASRS Report | 543747 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Miss Distance | horizontal : 28200 vertical : 700 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Received a pointout on aircraft Y from ZID at FL390. Aircraft X was climbing off ord and issued FL410. When aircraft X was asked if he could be level before in conflict with aircraft Y. He answered in the affirmative. When aircraft X was asked what his rate of climb was out of FL390, he responded that he could not make the altitude in time. Aircraft X was issued a 110 degree heading but we were not able to hold 5 mi separation.
Original NASA ASRS Text
Title: ZAU CTLR WAS UNABLE TO PREVENT A LOSS OF SEPARATION BTWN A B757 CLBING TO FL410 AND AN ACR LEVEL AT FL390.
Narrative: RECEIVED A POINTOUT ON ACFT Y FROM ZID AT FL390. ACFT X WAS CLBING OFF ORD AND ISSUED FL410. WHEN ACFT X WAS ASKED IF HE COULD BE LEVEL BEFORE IN CONFLICT WITH ACFT Y. HE ANSWERED IN THE AFFIRMATIVE. WHEN ACFT X WAS ASKED WHAT HIS RATE OF CLB WAS OUT OF FL390, HE RESPONDED THAT HE COULD NOT MAKE THE ALT IN TIME. ACFT X WAS ISSUED A 110 DEG HDG BUT WE WERE NOT ABLE TO HOLD 5 MI SEPARATION.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.